102011002020 has 96 divisors (see below), whose sum is σ = 325108304640. Its totient is φ = 26539441920.

The previous prime is 102011002007. The next prime is 102011002081. The reversal of 102011002020 is 20200110201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 102011001993 and 102011002011.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2281632 + ... + 2325911.

It is an arithmetic number, because the mean of its divisors is an integer number (3386544840).

Almost surely, 2^102011002020 is an apocalyptic number.

102011002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102011002020 is an abundant number, since it is smaller than the sum of its proper divisors (223097302620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102011002020 is a wasteful number, since it uses less digits than its factorization.

102011002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607602 (or 4607594 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 102011002020 its reverse (20200110201), we get a palindrome (122211112221).

The spelling of 102011002020 in words is "one hundred two billion, eleven million, two thousand, twenty".